CN206280288U - A kind of vertical thrust slide bearing with holdback - Google Patents

Abstract

The utility model discloses a vertical thrust sliding bearing with a backstop, which comprises a casing, a sealing shell, a vertical thrust sliding bearing and a backstop. Shell, the sealing shell is fixedly connected with the outer shell, the sealed shell includes an upper shell, a connecting shell and a lower shell, the lower shell is fixedly connected with the outer shell, and the connecting shell is fixedly connected with the upper shell and the lower shell Between the shells, the backstop is fixed in the upper casing, the backstop is sleeved on the top of the motor shaft, the vertical thrust sliding bearing is sleeved outside the motor shaft, and the vertical thrust sliding bearing Located in the connection case and the lower case. The vertical thrust sliding bearing with a backstop of the utility model has a simple structure, is convenient for installation and replacement, and does not reverse.

Description

A vertical thrust sliding bearing with a backstop

technical field

The utility model relates to the technical field of bearings, in particular to a vertical thrust sliding bearing with a backstop for water pump motors.

Background technique

A pump is a machine that moves or pressurizes a fluid. It transfers the mechanical energy of the prime mover or other external energy to the liquid to increase the energy of the liquid. The pump is mainly used to transport liquids such as water, oil, acid and alkali liquid, emulsion, suspoemulsion and liquid metal, and can also transport liquid, gas mixture and liquid containing suspended solids. Pumps can usually be divided into three categories according to their working principles: positive displacement pumps, dynamic pumps and other types of pumps. In addition to classification by working principle, it can also be classified and named by other methods. For example, according to the driving method, it can be divided into electric pumps and water wheel pumps; according to the structure, it can be divided into single-stage pumps and multi-stage pumps; Water pumps, oil pumps and mud pumps, etc. According to whether there is a shaft structure, it can be divided into linear pumps and traditional pumps. The water pump can only transport the logistics with fluid as the medium, and cannot transport solids.

As the power equipment in the water treatment process, the pump plays the role of sewage lifting, transportation and chemical metering. Its importance is self-evident. Once there is a problem with the pump equipment in some key links, it will affect the whole body.

Thrust sliding bearings are sliding bearings that bear axial thrust and limit the axial movement of the shaft. Thrust bearings whose two friction surfaces are completely separated by a fluid film are divided into hydrodynamic thrust bearings and hydrostatic thrust bearings, which are suitable for high and medium speed operation. Thrust bearings whose two friction surfaces cannot be completely separated by a fluid film work under boundary lubrication and are only suitable for low-speed operation.

The motor generally uses a common integral vertical thrust sliding bearing (as shown in Figure 1), and the vertical thrust sliding bearing is composed of a guide bearing seat 43, a rotating thrust head 41, a set of guide pads 42 and a set of thrust pads 44 compositions. The radial load of the journal part is loaded by the thrust head 41 onto the arc-shaped guide pad 42 , while the axial thrust load is loaded by the mirror surface of the thrust head 41 onto the circular thrust pad 44 . The thrust head 41 and the motor shaft select the transition fit and add the lock key device.

In water conservancy projects, there are some special requirements for the shafting of hydroelectric motors. The shaft system of the water motor needs to rotate in one direction, but there is still water in the pump pipe when the pump is stopped, because the power of the pump is lost, the water will flow back, and the backflow of water will cause the shaft system to reverse. A check valve is installed in the road, and the water valve is closed when the pump is stopped. The check valve in the pipeline is expensive, especially the check valve for large pumps, and its price is basically the same as that of the main body of the motor.

Utility model content

The technical problem to be solved by the utility model is: aiming at the technical problems existing in the prior art, the utility model provides a vertical thrust sliding bearing with a backstop, which has a simple structure, is easy to install and replace, and will not reverse.

In order to solve the problems of the technologies described above, the technical solution proposed by the utility model is:

A vertical thrust sliding bearing with a backstop, including a casing, a sealed shell, a vertical thrust sliding bearing and a backstop, the motor shaft of the motor is installed in the casing and the sealed casing, and extends out of the sealed casing. The sealing shell is fixedly connected with the outer shell, the sealing shell includes an upper shell, a connecting shell and a lower shell, the lower shell is fixedly connected with the outer shell, and the connecting shell is fixedly connected between the upper shell and the lower shell, The backstop is fixed in the upper casing, the backstop is sleeved on the top of the motor shaft, the vertical thrust sliding bearing is sleeved outside the motor shaft, and the vertical thrust sliding bearing is located between the connecting shell and the Inside the lower enclosure.

As a further improvement of the above technical solution:

The vertical thrust sliding bearing includes a thrust head, a guide shoe, a guide bearing seat, and a thrust shoe. The guide shoe is sleeved on the outside of the thrust head, and the guide shoe is installed in the guide bearing seat. At the lower end, the guide bearing seat is installed in the lower casing.

The upper end of the thrust head is provided with a sealing cover, a sealing device is provided between the sealing cover and the thrust head, and the sealing cover is sleeved on the motor shaft.

A sleeve is arranged between the thrust head and the motor shaft.

An oil sealing ring is arranged on the sleeve.

The structure also includes a cooler located within the lower enclosure.

The bottom of the upper casing is provided with a mounting plate, the center of the mounting plate is provided with a lower cover, the top of the upper casing is provided with an upper cover, and the backstop is installed on the mounting plate.

The bottom of the lower casing is provided with an oil sealing bottom plate and a lower sealing plate, and the lower sealing plate is located between the oil sealing bottom plate and the shell.

The motor shaft, the backstop, and the vertical thrust sliding bearing are coaxial.

Compared with the prior art, the utility model has the advantages of:

In the vertical thrust sliding bearing with a backstop of the utility model, when the motor shaft rotates normally, the backstop blocks in the backstop are disengaged and do not touch due to the rotating speed, and the backstop does not function; When causing the motor shaft to rotate in the reverse direction, the backstop block produces a stop effect, locks the motor shaft, and prevents the motor shaft from reversing. The vertical thrust sliding bearing with a backstop of the utility model, the backstop, the vertical thrust sliding bearing and the sealing shell are installed as a whole, and then installed with the motor shaft, the installation is simple, and the debugging and replacement are convenient.

Description of drawings

Fig. 1 is a structural schematic diagram of a vertical thrust sliding bearing with a backstop in the prior art.

Fig. 2 is a schematic structural view of the utility model.

illustration:

1. Motor shaft; 11. Sleeve; 111. Oil sealing ring; 2. Shell; 3. Sealing shell; 31. Upper shell; 311. Mounting plate; 312. Upper cover; 313. Lower cover; 32. Lower casing; 321, oil sealing bottom plate; 322, lower sealing plate; 33, connecting shell; 4, vertical thrust sliding bearing; 41, thrust head; 42, guide shoe; 43, guide bearing seat; 44, thrust shoe; 45. Sealing cover; 5. Backstop; 6. Cooler; 61. Nozzle.

detailed description

The specific embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the utility model, and are not intended to limit the utility model.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations”. Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

Fig. 2 shows an embodiment of the vertical thrust sliding bearing with a backstop of the present invention, including a casing 2 sealing shell 3, a vertical thrust sliding bearing 4, a backstop 5 and a cooler 6, the motor of the motor The shaft 1 is installed in the casing 2 and the sealing casing 3 , and extends out of the sealing casing 3 , and the sealing casing 3 is fixedly connected with the casing 2 . The motor shaft 1, the backstop 5, and the vertical thrust sliding bearing 4 are coaxial, and the vertical thrust sliding bearing 4 and the backstop 5 are sleeved outside the motor shaft 1. The vertical thrust sliding bearing 4 and the backstop 5 are installed in the sealing shell 3 and form an integral body with the sealing shell 3, which is convenient for installation on the motor shaft 1 and for future maintenance and replacement.

The sealing case 3 includes an upper casing 31 , a connecting casing 33 and a lower casing 32 , the lower casing 32 is fixedly connected to the outer casing 2 , and the connecting casing 33 is fixedly connected between the upper casing 31 and the lower casing 32 .

In this embodiment, the vertical thrust sliding bearing 4 is located in the connection shell 33 and the lower casing 32, and the vertical thrust sliding bearing 4 includes a thrust head 41, a guide shoe 42, a guide bearing seat 43, a thrust shoe 44, and 42 sets of guide shoes Located outside the thrust head 41 , the guide shoe 42 is installed in the guide bearing seat 43 , the thrust shoe 44 is located at the lower end of the thrust head 41 , and the guide bearing seat 43 is installed in the lower casing 32 . The thrust head 41 is not in direct contact with the motor shaft 1 , the upper end of the thrust head 41 is provided with a sealing cover 45 , a sealing device is provided between the sealing cover 45 and the thrust head 41 , and the sealing cover 45 is sleeved on the motor shaft 1 . A sleeve 11 is provided between the thrust head 41 and the motor shaft 1 , and an oil sealing ring 111 is provided on the sleeve 11 . The bottom of the lower casing 32 is provided with an oil sealing bottom plate 321 and a lower sealing plate 322 , and the lower sealing plate 322 is located between the oil sealing bottom plate 321 and the casing 2 . The cavity between the oil sealing ring 111 and the oil sealing bottom plate 321 forms an oil groove, and the entire vertical thrust sliding bearing 4 is directly lubricated with oil.

In this embodiment, the bottom of the upper casing 31 is provided with a mounting plate 311, the center of the mounting plate 311 is provided with a lower cover 313, the top of the upper casing 31 is provided with an upper cover 312, and the backstop 5 is installed on the mounting plate 311 superior. The backstop 5 is fixed in the upper casing 31 , and the backstop 5 is sheathed on the top of the motor shaft 1 .

In this embodiment, the cooler 6 is located in the lower casing 32 , the cooler 6 is provided with a plurality of nozzles 61 , the thrust pad 44 is provided with oil inlet holes, and the nozzles 61 extend into the oil inlet holes. The cooler 6 is used for cooling and lubricating the whole bearing.

In the utility model vertical thrust sliding bearing with a backstop, the thrust head 41 and the backstop 5 are set on the motor shaft 1, and the radial bearing and the thrust bearing of the vertical thrust sliding bearing 4 act on the thrust head 41, providing Radial support and axial support. When the motor shaft 1 rotates normally, the backstop block in the backstop 5 is disengaged and does not contact the motor shaft, and the backstop 5 does not work; when an abnormality may cause the motor shaft 1 to rotate in reverse, the backstop block will A stopping effect is generated, and the motor shaft 1 is locked to prevent the motor shaft 1 from reversing.

The above are only preferred embodiments of the utility model, and do not limit the utility model in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical proposal of the present invention.

Claims (9)

1. A vertical thrust sliding bearing with a backstop, characterized in that it comprises a casing (2), a sealed case (3), a vertical thrust sliding bearing (4) and a backstop (5), and the motor of the motor The shaft (1) is installed in the casing (2) and the sealing casing (3), and extends out of the sealing casing (3), the sealing casing (3) is fixedly connected with the casing (2), and the sealing casing (3) It includes an upper casing (31), a connection casing (33) and a lower casing (32), the lower casing (32) is fixedly connected to the outer casing (2), and the connection casing (33) is fixedly connected to the upper casing (31) and the lower casing (32), the backstop (5) is fixed in the upper casing (31), and the backstop (5) is sleeved on the top of the motor shaft (1), The vertical thrust sliding bearing (4) is sheathed outside the motor shaft (1), and the vertical thrust sliding bearing (4) is located in the connecting shell (33) and the lower casing (32). 2. The vertical thrust sliding bearing with backstop according to claim 1, characterized in that, the vertical thrust sliding bearing (4) comprises a thrust head (41), a guide shoe (42), a guide bearing seat (43), thrust pad (44), the guide pad (42) is sleeved on the outside of the thrust head (41), the guide pad (42) is installed in the guide bearing housing (43), the thrust pad (44 ) is located at the lower end of the thrust head (41), and the guide bearing seat (43) is installed in the lower casing (32). 3. The vertical thrust sliding bearing with backstop according to claim 2, characterized in that, the upper end of the thrust head (41) is provided with a sealing cover (45), and the sealing cover (45) and the thrust head A sealing device is arranged between (41), and the sealing cover (45) is sheathed on the motor shaft (1). 4. The vertical thrust sliding bearing with a backstop according to claim 3, characterized in that a sleeve (11) is provided between the thrust head (41) and the motor shaft (1). 5. The vertical thrust sliding bearing with a backstop according to claim 4, characterized in that an oil seal ring (111) is provided on the sleeve (11). 6. The vertical thrust sliding bearing with a backstop according to claim 2, characterized in that it further comprises a cooler (6), and the cooler (6) is located in the lower casing (32). 7. The vertical thrust sliding bearing with backstop according to claim 1, characterized in that, the bottom of the upper casing (31) is provided with a mounting plate (311), and the center of the mounting plate (311) A lower cover (313) is provided, an upper cover (312) is provided on the top of the upper enclosure (31), and the backstop (5) is installed on the mounting plate (311). 8. The vertical thrust sliding bearing with backstop according to claim 1, characterized in that, the bottom end of the lower casing (32) is provided with an oil sealing bottom plate (321) and a lower sealing plate (322) , the lower sealing plate (322) is located between the oil sealing bottom plate (321) and the casing (2). 9. The vertical thrust sliding bearing with a backstop according to claim 1, characterized in that the motor shaft (1), the backstop (5), and the vertical thrust sliding bearing (4) are coaxial.