Self-lubricating bearing spacer bush for double-screw pump

Abstract

The utility model discloses a self-lubricating bearing spacer bush for a double-screw pump, which comprises a shell and a screw, a rotating rod is coaxially fixed at the right end of the screw, a bearing is sleeved on the rotating rod, the rotating rod is rotatably arranged in the shell through the bearing, a spacer bush is attached to one side of the bearing, and the spacer bush is sleeved on the right end of the screw. And an oil outlet mechanism for outputting lubricating oil is arranged in the spacer bush. According to the utility model, the oil outlet mechanism is arranged inside the lubricating device, and the lubricating oil is output into the bearing through the oil outlet mechanism to lubricate the bearing, so that the problem that the workload is large when a lubricating agent is manually supplemented is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a double screw pump technical field, concretely relates to a self -lubricating bearing spacer sleeve for double screw pump. BACKGROUND

[0002] Double screw pump is a positive displacement pump, is widely used in various industrial fields. In the operation process of double screw pump, screw is installed in the pump body through bearing, and the lubrication state of bearing directly influences the running efficiency, service life and reliability of pump, therefore, it is an indispensable step to inject lubricant into bearing to keep the lubrication state of bearing after the operation of double screw pump for a period of time.

[0003] Traditional lubrication mode often relies on artificial periodic supplement lubricant, and there are problems such as insufficient or excessive supplement lubricant, and the pump body needs to be disassembled when supplementing lubricant, so the workload is large, and it is difficult to adapt to the requirements of modern high speed, heavy load, harsh working conditions on bearing. UTILITY MODEL CONTENTS

[0004] The utility model discloses a self -lubricating bearing spacer sleeve for double screw pump, the spacer sleeve sets up the oil outlet mechanism in its inside and passes through the oil outlet mechanism and exports lubricating oil to the bearing to the bearing and plays the role of lubrication, solve the problem of big workload when artificial supplement lubricant.

[0005] The utility model discloses the technical scheme that the above problem is adopted:

[0006] A self -lubricating bearing spacer sleeve for double screw pump, including the casing and screw, the screw has the rotating rod that is coaxially fixed with right end, is set with the bearing on the rotating rod, and the rotating rod is rotationally arranged in the casing through the bearing, one side of the bearing is attached setting has the spacer sleeve, and the oil outlet mechanism of exporting lubricating oil is arranged in the spacer sleeve.

[0007] In the above technical scheme, preferably, the spacer sleeve includes an outer ring and an inner ring, the cross sections of the outer ring and the inner ring are both annular, the outer ring is fixed in the casing and attached to the outer ring of the bearing, the inner ring is sleeved and fixed on the rotating rod and attached to the inner ring of the bearing, a first cavity is formed between the outer ring and the inner ring, the first cavity is in communication with the position of the bearing steel ball, and the oil outlet mechanism is arranged on the inner ring and inputs lubricating oil into the first cavity.

[0008] In the above technical scheme, preferably, the oil outlet mechanism includes a second cavity and a plurality of valves, the second cavity is arranged in the rotating rod, a plurality of mounting holes are formed on the inner ring, the number of the mounting holes is equal to that of the valves and is distributed in equal intervals on the circumference, the valves are respectively fixed in the mounting holes, a plurality of through holes are formed on the rotating rod and are in communication with the mounting holes, and the through holes are in communication with the second cavity.

[0009] In the technical scheme, preferably, the valve comprises a support, a movable piece and a spring, the support is a hollow structure with two open ends, the upper opening of the support is located in the first cavity, the lower opening of the support is communicated with the through hole, the movable piece is slidingly arranged in the support and sealingly abuts against the lower opening of the support, and the spring is located on the upper side of the movable piece and abuts against the sliding piece and the support at two ends.

[0010] In the technical scheme, preferably, the right end of the second cavity is provided with an oil injection port communicated with the right end opening of the rotating rod, and the oil injection port is provided with a sealing bolt connected through threads.

[0011] In the technical scheme, preferably, the lower opening of the movable piece and the support is provided with a matching inclined surface.

[0012] Compared with the prior art, the utility model has the following advantages and effects:

[0013] The utility model discloses a bearing self-lubricating bearing spacer for double screw pump, which comprises a shell, a screw, a rotating rod, a through hole, a bearing, a bearing outer ring, a bearing inner ring, a bearing steel ball, a spacer, an outer ring, an inner ring, a first cavity, a mounting hole, an oil outlet mechanism, a second cavity, a valve, a support, a movable piece, a spring, an upper opening and a lower opening. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall sectional view of the self-lubricating bearing spacer for double screw pump.

[0015] Figure 2 It is Figure 1 It is the sectional enlarged view of A in the figure.

[0016] Figure 3 It is Figure 2 It is the side sectional view of the spacer.

[0017] Figure 4 It is Figure 3 It is the enlarged view of the valve.

[0018] Among them, the shell 1, the screw 2, the rotating rod 3, the through hole 31, the bearing 4, the bearing outer ring 41, the bearing inner ring 42, the bearing steel ball 43, the spacer 5, the outer ring 51, the inner ring 52, the first cavity 53, the mounting hole 54, the oil outlet mechanism 6, the second cavity 61, the valve 62, the support 63, the movable piece 64, the spring 65, the upper opening 66, the lower opening 67, the oil injection port 68, the sealing bolt 69, the inclined surface 70. DETAILED DESCRIPTION

[0019] The utility model discloses make further detailed description to the utility model below combining with the drawing and through the embodiment, the following embodiment is the explanation of the utility model and the utility model is not limited to the following embodiment.

[0020] Referring to Figures 1-4 The utility model discloses a self -lubricating bearing spacer sleeve for double screw pump, including casing 1 and screw 2, the screw 2 has right end coaxial fixed rotation rod 3, and rotation rod 3 is set with bearing 4, and rotation rod 3 is set in casing 1 through bearing 4 rotation, one side of bearing 4 is attached with spacer sleeve 5, and the oil outlet mechanism 6 of outputting lubricating oil is arranged in spacer sleeve 5.

[0021] The utility model discloses make further detailed description to the utility model below combining with the drawing and through the embodiment, the following embodiment is the explanation of the utility model and the utility model is not limited to the following embodiment.

[0022] Referring to Figure 2 、 Figure 3 The utility model discloses a self -lubricating bearing spacer sleeve for double screw pump, including casing 1 and screw 2, the screw 2 has right end coaxial fixed rotation rod 3, and rotation rod 3 is set with bearing 4, and rotation rod 3 is set in casing 1 through bearing 4 rotation, one side of bearing 4 is attached with spacer sleeve 5, and the oil outlet mechanism 6 of outputting lubricating oil is arranged in spacer sleeve 5.

[0023] The utility model discloses make further detailed description to the utility model below combining with the drawing and through the embodiment, the following embodiment is the explanation of the utility model and the utility model is not limited to the following embodiment.

[0024] Referring to Figure 2 、 Figure 3The oil outlet mechanism 6 comprises a second cavity 61 and a plurality of valves 62, the second cavity 61 is arranged in the rotating rod 3, a plurality of mounting holes 54 are arranged on the inner ring 52 in equal number and equidistantly distributed in a circle, the valves 62 are respectively fixed in the mounting holes 54, a plurality of through holes 31 are arranged on the rotating rod 3 and communicated with the mounting holes 54, and the through holes 31 are communicated with the second cavity 61.

[0025] In use, a certain amount of lubricating oil is first injected into the second cavity 61 for storage, and in the working process of the utility model, the valve 62 is opened, so that the lubricating oil in the second cavity 61 enters the first cavity 53 through the through hole 31 and the valve 62 under the action of gravity and centrifugal force and then penetrates into the bearing 4 to realize lubrication of the bearing 4. Since the rotating rod 3 can realize uniform oil outlet of the plurality of valves 62 when rotating, the plurality of positions of the bearing 4 can be uniformly lubricated, and the lubrication effect of the bearing 4 is improved. The equidistantly arranged through holes 31, mounting holes 54 and valves 62 can ensure the uniformity of the rotating rod 3 and the spacer 5, and the stability of the inner ring 52 of the rotating rod 3 when rotating is ensured.

[0026] Referring to Figure 2 The right end of the second cavity 61 is provided with an oil inlet 68, the oil inlet 68 is communicated with the right end opening of the rotating rod 3, and a sealing bolt 69 is arranged in the oil inlet 68 through threaded connection.

[0027] The lubricating oil is injected into the second cavity 61 by unscrewing the sealing bolt 69, and the lubricating oil is prevented from leaking by tightening the sealing bolt 69. Therefore, in the utility model, only the lubricating oil needs to be injected into the second cavity 61 periodically, the workload of manual operation can be reduced, the frequency of stopping the double-screw pump for supplementing lubricating oil is reduced, and the influence on production is reduced.

[0028] Referring to Figure 4 The valve 62 comprises a bracket 63, a movable piece 64 and a spring 65, the bracket 63 is a hollow structure with two open ends, the upper opening 66 of the bracket 63 is located in the first cavity 53, the lower opening 67 of the bracket 63 is communicated with the through hole 31, the movable piece 64 is slidably arranged in the bracket 63 and tightly attached to the lower opening 67 of the bracket 63, and the spring 65 is located on the upper side of the movable piece 64 and the two ends of the spring 65 are respectively abutted on the sliding piece and the bracket 63.

[0029] When the double screw pump works, the rotating rod 3 rotates, and the lubricating oil in the second cavity 61 applies a pushing force to the movable part 64 under the action of centrifugal force, and the movable part 64 is also subjected to the action of centrifugal force, when the rotating speed of the rotating rod 3 reaches a certain value, the movable part 64 can overcome the elastic force of the spring 65 and separate from the lower opening 67 to realize the opening of the valve 62, at this time the spring 65 is compressed, and the lubricating oil can enter the first cavity 53 to lubricate the bearing 4; when the double screw pump stops, the rotating rod 3 slows down until it stops, and the movable part 64 is pressed against the lower opening 67 under the action of the spring 65 to realize the closing of the valve 62. Therefore, the valve 62 can automatically open to realize the lubrication of the bearing 4 when the double screw pump runs, and can automatically close when the double screw pump stops, and the faster the rotating speed of the rotating rod 3, the faster the consumption of the lubricating oil, the greater the pushing force of the lubricating oil and the centrifugal force of the movable part 64, which results in that the distance between the movable part 64 and the lower opening 67 is greater, the path of the lubricating oil is wider, and therefore the speed of the lubricating oil supplementing into the first cavity 53 is faster, which ensures that the lubricating oil can be supplemented in time when the rotating rod 3 rotates at high speed, thereby prolonging the time that the double screw pump can continuously run, and solving the problems of insufficient or excessive lubricating oil when manually supplementing lubricating oil.

[0030] Referring to Figure 4 The lower opening 67 of the movable part 64 and the bracket 63 is provided with a matching inclined surface 70, the inclined surface 70 can guide the movable part 64, so that the movable part 64 and the lower opening 67 can be closely matched, and the matching area between the movable part 64 and the lower opening 67 is increased, and the sealing effect when the valve 62 is closed is improved.

[0031] The above described in the specification of the present application is only an example of the present application. Those skilled in the art of the present application can make various modifications or supplements or adopt similar ways to replace the described specific embodiments, as long as they do not deviate from the content of the specification of the present application or exceed the scope defined by the claims, and should belong to the protection scope of the present application.

Claims

1. A self-lubricating bearing spacer for a twin-screw pump, comprising a housing and a screw, wherein a rotating rod is coaxially fixed to the right end of the screw, a bearing is sleeved on the rotating rod, and the rotating rod is rotatably disposed within the housing via the bearing, characterized in that: A spacer is fitted to one side of the bearing, and an oil outlet mechanism for discharging lubricating oil is installed inside the spacer.

2. The self-lubricating bearing spacer for a twin-screw pump according to claim 1, characterized in that: The spacer includes an outer ring and an inner ring, both of which have annular cross-sections. The outer ring is fixed inside the housing and fits against the outer ring of the bearing. The inner ring is sleeved and fixed on the rotating rod and fits against the inner ring of the bearing. A first cavity is formed between the outer ring and the inner ring, and the first cavity is connected to the position of the bearing steel ball. The oil outlet mechanism is set on the inner ring and supplies lubricating oil into the first cavity.

3. The self-lubricating bearing spacer for a twin-screw pump according to claim 1, characterized in that: The oil outlet mechanism includes a second cavity and several valves. The second cavity is located inside the rotating rod. The inner ring has an equal number of mounting holes distributed circumferentially at equal intervals. The valves are fixed in the mounting holes. The rotating rod has several through holes that communicate with the mounting holes and are connected to the second cavity.

4. The self-lubricating bearing spacer for a twin-screw pump according to claim 3, characterized in that: The valve includes a bracket, a movable component, and a spring. The bracket has a hollow structure with openings at both ends. The upper opening of the bracket is located in the first cavity, and the lower opening of the bracket is connected to the through hole. The movable component is slidably disposed in the bracket and is sealed and fitted in the lower opening of the bracket. The spring is located on the upper side of the movable component, and the two ends of the spring abut against the sliding component and the bracket, respectively.

5. The self-lubricating bearing spacer for a twin-screw pump according to claim 3, characterized in that: The right end of the second cavity is provided with an oil injection port, which is connected to the right end opening of the rotating rod. A sealing bolt is installed inside the oil injection port through a threaded connection.

6. The self-lubricating bearing spacer for a twin-screw pump according to claim 4, characterized in that: The lower openings of the movable component and the bracket are provided with beveled surfaces for fitting together.

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