Novel connecting shaft and guide bearing structure of long shaft pump
By designing a long-axis pump coupling and guide bearing structure including external threads and internal threads and guide bearings, the problems of complex assembly, poor concentricity and insufficient rigidity in the prior art are solved, and the effects of high precision, low error and high rigidity are achieved.
Patent Information
- Application Number
- CN202421979850.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-08-15
AI Technical Summary
The existing long-axis pump joint structure has complex assembly, poor concentricity, insufficient rigidity, and large processing errors.
A joint shaft and guide bearing structure including an upper shaft, an upper cylinder body, a shaft sleeve, a support seat, a lower shaft, a lower cylinder body, a fixing screw, a key and a guide bearing are designed. The two shafts are directly connected to the internal thread through external threads, and a guide bearing is designed on the outside of the shaft sleeve to improve the rigidity of the shaft.
High assembly accuracy, low machining error and high shaft rigidity are achieved, simplifying the assembly process and reducing the number of parts.
Smart Images
Figure CN222887100U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a coupling shaft and a guide bearing structure, in particular to a novel coupling shaft and guide bearing structure of a long shaft pump with high assembly precision, small cumulative machining error and good shaft rigidity. Background Art
[0002] Most of the existing coupling shaft methods of long shaft pumps adopt split couplings for connection. In this structure, it is clamped on the shaft in a split manner and then fixed with a split coupling. This structure requires more parts and has a larger cumulative machining error, resulting in poor concentricity after the shaft connection. On the other hand, the assembly of this structure is relatively complex. The split coupling is connected by screws, and different tightening torques of each screw during installation will also cause poor concentricity of the shaft.
[0003] The existing technology only simply realizes the purpose of connecting the shafts at the coupling shaft part, and does not design or is unable to design a guide bearing structure to support the pump shaft, resulting in poor rigidity of the pump shaft. Summary of the Utility Model
[0004] Aiming at the above problems, the main purpose of the utility model is to provide a novel coupling shaft and guide bearing structure of a long shaft pump with high assembly precision, small cumulative machining error and good shaft rigidity.
[0005] The utility model solves the above technical problems through the following scheme: A novel coupling shaft and guide bearing structure of a long shaft pump, the novel coupling shaft and guide bearing structure of the long shaft pump includes: an upper shaft, an upper cylinder body, a shaft sleeve, a support seat, a lower shaft, a lower cylinder body, a set screw, a key, and a guide bearing.
[0006] The shaft diameter at the coupling shaft part of the upper shaft is the same as that of the lower shaft. The upper shaft is designed with an upper shaft keyway and an external thread, and the lower shaft is designed with an internal thread that matches the external thread of the upper shaft at the lower shaft keyway.
[0007] Keys are designed on both the upper shaft and the lower shaft. A shaft sleeve is sleeved on the outside of the shaft, and a guide bearing and a support seat are arranged in sequence outside the shaft sleeve; the guide bearing is installed in the support seat.
[0008] The upper cylinder body and the lower cylinder body are fixedly installed together, and the support seat is located between the upper cylinder body and the lower cylinder body.
[0009] During installation, first install the key in the upper shaft keyway, sleeve the shaft sleeve on the upper shaft and slide it to the shaft shoulder of the upper shaft. Then connect the upper shaft and the lower shaft together by thread, install the key in the lower shaft keyway, and slide the shaft sleeve to the shaft shoulder of the lower shaft.
[0010] In a specific embodiment of the utility model, the upper cylinder body and the lower cylinder body are fixedly installed together by a combination of studs and nuts.
[0011] In a specific embodiment of the present utility model, an internal thread is drilled at the contact position between the support seat and the guide bearing, and a first set screw is installed.
[0012] In a specific embodiment of the present utility model, an upper shaft groove is provided on the upper shaft, and a second set screw is installed between the upper shaft groove and the shaft sleeve.
[0013] In a specific embodiment of the present utility model, through holes are evenly distributed in the circumferences of the upper cylinder body, the support seat, and the lower cylinder body, and they are connected together by studs and nuts. The upper cylinder body is located above the support seat, and the lower cylinder body is located below the support seat.
[0014] In a specific embodiment of the present utility model, a sealing gasket is installed on the contact surfaces of the upper cylinder body, the lower cylinder body, and the support seat.
[0015] The positive and progressive effects of the present utility model are as follows: Compared with common similar technologies, for the novel shaft connecting and guide bearing structure of the long shaft pump provided by the present utility model, external threads and internal threads are respectively designed on the shaft, and the two shafts are directly connected together by threads, and a shaft sleeve is sleeved on the shaft. This structure has fewer processed parts, less cumulative processing error, and high assembly accuracy; by designing a guide bearing outside the shaft sleeve, a sliding bearing structure is formed to support the shaft connecting part and improve the rigidity of the shaft. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram (cross-sectional view) of the overall structure of the present utility model.
[0017] Figure 2 It is a schematic diagram of the structure of the upper shaft in the present utility model.
[0018] Figure 3 It is a schematic diagram of the structure of the lower shaft in the present utility model.
[0019] The following are the names corresponding to the reference numerals in the present utility model:
[0020] Upper shaft 1, upper cylinder body 2, shaft sleeve 3, sealing gasket 4, support seat 5, lower shaft 6, lower cylinder body 7, first set screw 801, second set screw 802, key 9, guide bearing 10, stud 11, nut 12; shaft connecting part of the upper shaft 101, keyway of the upper shaft 102, external thread 103, shoulder of the upper shaft 104, upper shaft groove 105; shaft connecting part of the lower shaft 601, keyway of the lower shaft 602, internal thread 603, shoulder of the lower shaft 604. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The following provides a preferred embodiment of the present utility model in conjunction with the drawings to elaborate in detail on the technical solution of the present utility model.
[0022] Figure 1 It is a schematic diagram (cross-sectional view) of the overall structure of the present utility model,Figure 2 This is a schematic structural diagram of the upper shaft in the present utility model. Figure 3 This is a schematic structural diagram of the lower shaft in the present utility model. As Figures 1-3 shown: A novel shaft coupling and guide bearing structure of a long shaft pump proposed by the present utility model is characterized in that: the novel shaft coupling and guide bearing structure of the long shaft pump includes: an upper shaft 1, an upper cylinder 2, a shaft sleeve 3, a support seat 5, a lower shaft 6, a lower cylinder 7, a first set screw 801, a second set screw 802, a key 9, and a guide bearing 10.
[0023] The shaft diameter of the shaft coupling part 101 of the upper shaft is the same as that of the shaft coupling part 601 of the lower shaft. An upper shaft keyway 102 and an external thread 103 are designed on the upper shaft 1. An internal thread 603 that mates with the external thread 103 of the upper shaft is designed on the lower shaft 6. Keys are designed on both the upper shaft and the lower shaft. A shaft sleeve 3 is sleeved on the outside of the shaft. The outside of the shaft sleeve 3 is successively a guide bearing 10 and a support seat 5; the guide bearing 10 is installed in the support seat 5. The upper cylinder 2 and the lower cylinder 7 are fixedly installed together. The support seat 5 is located between the upper cylinder 2 and the lower cylinder 7; during installation, first install the key 9 in the upper shaft keyway 102, install the shaft sleeve 3 on the upper shaft and slide it to the shaft shoulder 104 of the upper shaft. Subsequently, connect the upper shaft 1 and the lower shaft 6 together by threading, then install the key 9 in the lower shaft keyway 602, and slide the shaft sleeve 3 to the shaft shoulder 604 of the lower shaft.
[0024] In the specific implementation process, the upper cylinder 2 and the lower cylinder 7 are fixedly installed together by a combination of studs 11 and nuts 12.
[0025] Internal threads are drilled at the contact position between the support seat 5 and the guide bearing and the first set screw 801 is installed. An upper shaft groove 105 is provided on the upper shaft 1. A second set screw 802 is installed between the upper shaft groove and the shaft sleeve 3.
[0026] Through holes are evenly distributed in the circumferences of the upper cylinder, the support seat, and the lower cylinder and are connected together by studs and nuts. The upper cylinder is located above the support seat, and the lower cylinder is located below the support seat. Sealing gaskets are installed on the contact surfaces between the upper and lower cylinders and the support seat.
[0027] A guide bearing is designed on the outside of the shaft sleeve, forming a sliding bearing with the shaft sleeve to support the shaft system and improve the rigidity of the shaft system.
[0028] The bushing is designed with internal threads. When the bushing is installed at the shoulder of the lower shaft, a set screw is installed in the internal threads to prevent axial movement of the bushing. Since keys are designed on both the upper shaft and the lower shaft, and a bushing is sleeved outside the shaft, the coaxiality of the upper and lower shafts can be ensured, and at the same time, the loosening of the threads between the upper and lower pump shafts during reverse rotation of the pump can be prevented. A guide bearing is installed in the support seat. The position where the support seat contacts the guide bearing is drilled with internal threads and a set screw is installed to prevent axial movement and rotation of the guide bearing. Through holes are evenly distributed in the circumferences of the upper cylinder body, the support seat and the lower cylinder body, and they are connected together by studs and nuts. The upper cylinder body is located above the support seat, and the lower cylinder body is located below the support seat. Sealing gaskets are installed on the contact surfaces of the upper and lower cylinder bodies and the support seat to prevent leakage of the medium inside the cylinder body. The bushing is sleeved in the cylinder body, so that the bushing at the coupling shaft part is located at the position of the guide bearing in the support seat, so that the bushing and the guide bearing form a sliding bearing to support the shafting.
[0029] In the utility model, external threads and internal threads are respectively designed on the shafts to be connected, and the two shafts are directly connected by threads, and a bushing is sleeved on the shaft for fixation and torque transmission. This structure has fewer processed parts, less cumulative processing error, and high assembly accuracy. On the other hand, this structure is simple to assemble and is not affected by different screw tightening torques.
[0030] In the utility model, a guide bearing structure is designed at the coupling shaft position, so that the bushing and the guide bearing form a sliding bearing to support the coupling shaft part and improve the rigidity of the shaft.
[0031] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection claimed by the utility model is defined by the appended claims and their equivalents.
Claims
1. A new type of connecting shaft and guide bearing structure for a long shaft pump, characterized in that: The novel shaft connection and guide bearing structure of the long shaft pump comprises: an upper shaft, an upper cylinder, a shaft sleeve, a support seat, a lower shaft, a lower cylinder, a key, and a guide bearing; the shaft diameter at the upper shaft connection is the same as the shaft diameter at the lower shaft connection, the upper shaft is designed with an upper shaft keyway and an external thread, and the lower shaft is designed with an internal thread that matches the lower shaft keyway with the external thread of the upper shaft; Keys are designed on both the upper shaft and the lower shaft, and a sleeve is mounted on the outer side of the shaft. The outer side of the sleeve is followed by a guide bearing and a support seat; the guide bearing is installed in the support seat, the upper cylinder and the lower cylinder are fixedly installed together, and the support seat is located between the upper cylinder and the lower cylinder; During installation, first install the key in the keyway of the upper shaft, put the sleeve on the upper shaft and slide it to the shoulder of the upper shaft, then connect the upper shaft and the lower shaft together through threads, then install the key in the keyway of the lower shaft, and slide the sleeve to the shoulder of the lower shaft.
2. The novel connecting shaft and guide bearing structure of the long shaft pump according to claim 1 is characterized in that: The upper cylinder and the lower cylinder are fixed together by a combination of studs and nuts.
3. The novel connecting shaft and guide bearing structure of the long shaft pump according to claim 1 is characterized in that: The contact position between the support seat and the guide bearing is drilled with an internal thread and is installed with a first set screw.
4. The novel connecting shaft and guide bearing structure of the long shaft pump according to claim 1 is characterized in that: An upper shaft groove is arranged on the upper shaft, and a second set screw is installed between the upper shaft groove and the shaft sleeve.
5. The novel connecting shaft and guide bearing structure of the long shaft pump according to claim 1 is characterized in that: The upper cylinder, the support seat and the lower cylinder are evenly designed with through holes on their circumferences and are connected together by studs and nuts. The upper cylinder is located above the support seat, and the lower cylinder is located below the support seat.
6. The novel connecting shaft and guide bearing structure of the long shaft pump according to claim 5 is characterized in that: Sealing pads are installed on the contact surfaces of the upper cylinder, the lower cylinder and the support seat.