Self-lubricating roots vacuum pump

Abstract

The utility model discloses a self-lubricating roots vacuum pump, which belongs to the technical field of roots vacuum pumps and comprises a pump body. A protective shell is fixed to one end of the pump body, and an oil injection mechanism is arranged at the top of the protective shell. The oil injection mechanism comprises a bottom plate, a top plate, an electromagnetic valve fixed to the outer wall of the top plate, an oil can connected to the input end of the electromagnetic valve, a hose fixed to the output end of the electromagnetic valve, a first threaded connector connected to one end of the hose and a second threaded connector fixed to the outer wall of the bottom plate. According to the self-oiling lubricating device, the self-oiling lubricating capacity of the gear in the protective shell can be achieved through the oiling mechanism installed on the protective shell, workers do not need to disassemble and assemble the protective shell in a time-consuming, labor-consuming and tedious mode, and the self-oiling lubricating device is convenient and fast to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to roots vacuum pump technical field, concretely is a kind of self-lubricating roots vacuum pump. BACKGROUND

[0002] Roots vacuum pump (abbreviation roots pump) is a variable volume vacuum pump, its working principle is through two opposite direction synchronous rotation axle, simultaneously drive two lobe rotors rotate in pump shell, to realize air extraction function. The characteristics of this pump are that there are small gaps between rotors and between rotor and inner wall of pump shell, and they do not contact each other, and it is widely used in petroleum, chemical and plastic industrial fields.

[0003] The axle of two lobe rotors in roots vacuum pump, one axle is directly connected to motor to drive, and the end of two axles in the same direction is located in the casing of pump body, and is linked through two meshing gears, to assist the simultaneous rotation operation of two lobe rotors.

[0004] And now the gear for linkage of two axles of roots vacuum pump often needs personnel to manually disassemble the casing to add lubricating oil to improve service life, but due to the time-consuming and laborious disassembly and assembly of casing, the maintenance operation of adding lubricating oil is also relatively cumbersome and inconvenient.

[0005] Based on this, the utility model discloses a kind of self-lubricating roots vacuum pump to solve the above problems. INVENTION CONTENTS

[0006] The utility model aims at providing a kind of self-lubricating roots vacuum pump to solve the above technical problems.

[0007] To achieve the above object, the utility model provides the following technical scheme: a kind of self-lubricating roots vacuum pump, comprising: pump body;The pump body one end is fixed with casing, the casing top is provided with oil injection mechanism;

[0008] Oil injection mechanism includes bottom plate and top plate, electromagnetic valve is fixed to the outer wall of top plate, oil can is connected to the input end of electromagnetic valve, hose is fixed to the output end of electromagnetic valve, first threaded joint is connected to one end of hose, and second threaded joint is fixed to the outer wall of bottom plate, the outer wall of first threaded joint is connected with joint nut by screw thread, one end of second threaded joint penetrates casing.

[0009] Preferably, the thread direction of the first threaded joint and the second threaded joint is consistent, the joint nut can be screwed at the same time, and the insertion end of the first threaded joint is fixed with a rubber ring.

[0010] Preferably, the first screw cap is connected to one end of the second threaded joint, and the oil can is provided with an opening at the top and a second screw cap is connected to the opening by screw thread.

[0011] Preferably, the bottom plate is arranged on the top of the shell and is fixed by bolts, and the shell is internally provided with two gears engaged with each other.

[0012] Preferably, the second threaded joint penetrates one end of the shell vertically towards the engagement of the two gears.

[0013] Preferably, the top of the bottom plate is fixed with two symmetrical connecting rods, one end of the top plate and the connecting rod is inserted, and the end of the connecting rod inserted with the top plate is locked with a limiting nut.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] Firstly, the pump body shields the two shaft linkage gears through the shell, and the oil injection mechanism installed on the shell can realize the self-oil injection lubrication of the gears in the shell, without the time-consuming and laborious disassembly and assembly of the shell.

[0016] Secondly, the components such as the electromagnetic valve installed on the top plate and the components such as the second threaded joint installed on the bottom plate in the oil injection mechanism can be freely disassembled and assembled, so that personnel can carry out subsequent maintenance work such as disassembly, assembly, inspection and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0018] Figure 1 It is the overall structure schematic diagram of the embodiment;

[0019] Figure 2 It is the highlighted oil injection mechanism schematic diagram of the embodiment;

[0020] Figure 3 It is the highlighted shell internal structure schematic diagram of the embodiment;

[0021] Figure 4 It is the highlighted bottom plate connection structure schematic diagram of the embodiment;

[0022] Figure 5 It is the highlighted hose connection structure schematic diagram of the embodiment.

[0023] In the drawings, the component list represented by each sign is as follows:

[0024] 1, pump body; 2, shell; 3, bottom plate; 4, connecting rod; 5, top plate; 6, electromagnetic valve; 7, oil can; 8, hose; 9, first threaded joint; 10, second threaded joint; 11, joint nut; 12, rubber ring; 13, first screw cap; 14, second screw cap; 15, limiting nut. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Please refer to Figures 1-5 The present application provides a technical solution: a self-lubricating Roots vacuum pump, comprising: a pump body 1; the pump body 1 has a shell 2 fixed at one end, and the shell 2 has an oil injection mechanism arranged at the top;

[0027] The oil injection mechanism comprises a bottom plate 3 and a top plate 5, an electromagnetic valve 6 fixed to the outer wall of the top plate 5, an oil can 7 connected to the input end of the electromagnetic valve 6, a hose 8 fixed to the output end of the electromagnetic valve 6, a first threaded joint 9 connected to one end of the hose 8, and a second threaded joint 10 fixed to the outer wall of the bottom plate 3, the outer wall of the first threaded joint 9 being threadedly connected with a joint nut 11, and one end of the second threaded joint 10 penetrating through the shell 2;

[0028] The pump body 1 is shielded by the shell 2 to protect the gears used by the two shafts in linkage, and the oil injection mechanism installed through the shell 2 can realize the self-oil injection lubrication of the gears in the shell 2, without the need for personnel to disassemble and assemble the shell 2 in a time-consuming, laborious and complicated manner. In the oil injection mechanism, the electromagnetic valve 6 indirectly controls the lubricating oil in the oil can 7 to enter the hose 8, and then the first threaded joint 9 and the second threaded joint 10 cooperate to assist the hose 8 to deliver the lubricating oil towards the inside of the shell 2. The oil can 7 can store the oil quantity required for multiple lubrication operations, meeting the needs of multiple lubrication operations of the gears.

[0029] Further preferably, the first threaded joint 9 and the second threaded joint 10 have consistent thread directions, can be threadedly connected with the joint nut 11 at the same time, and the insertion end of the first threaded joint 9 is fixed with a rubber ring 12;

[0030] The first threaded joint 9 and the second threaded joint 10 are connected with the joint nut 11 at the same time after being butted due to the consistent thread directions, and the insertion end of the first threaded joint 9 and the second threaded joint 10 is provided with the rubber ring 12, which can increase the sealing property during butt joint.

[0031] Further preferably, the first screw joint 9 is threadedly connected with the first cap 13 at one end, and the second screw joint 10 is threadedly connected with the second cap 14 at one end;

[0032] The second screw joint 10 can be sealed by the first cap 13 when not in use, so as to prevent impurities from entering, and the oil can 7 is used to store the lubricating oil through the opening at the top, and the second cap 14 is used to seal the opening in daily use.

[0033] Further preferably, the bottom plate 3 is arranged on the top of the protective shell 2 and is fixed by bolts, and the protective shell 2 is provided with two gears engaged with each other;

[0034] The bottom plate 3 is fixed to the protective shell 2 by bolts and can be detached together with the second screw joint 10.

[0035] Further preferably, the second screw joint 10 is vertically arranged at one end of the protective shell 2 and is directed towards the engagement of the two gears;

[0036] The second screw joint 10 is arranged in a penetrating manner, so that the output lubricating oil is sprayed towards the engagement of the two gears in the protective shell 2 for common lubrication.

[0037] Further preferably, the top of the bottom plate 3 is fixed with two symmetrical connecting rods 4, the top plate 5 is inserted with one end of the connecting rod 4, and the end of the connecting rod 4 inserted with the top plate 5 is locked with a limiting nut 15;

[0038] The end of the connecting rod 4 of the bottom plate 3 is provided with a supporting ring, which can be used to hold up the top plate 5 in cooperation with the insertion, and the end of the connecting rod 4 for insertion is provided with threads, so that the top plate 5 can be locked at the end of the connecting rod 4 by the limiting nut 15.

[0039] One specific application of the embodiment is that when the gears in the protective shell 2 need to be lubricated, the first cap 13 of the second screw joint 10 is detached, the first screw joint 9 and the end of the second screw joint 10 are inserted, the sealing is improved by the rubber ring 12 during the insertion, the union nut 11 of the first screw joint 9 is rotated, so that the union nut 11 is connected with the first screw joint 9 and the second screw joint 10 at the same time, and the first screw joint 9 and the second screw joint 10 are fixed together, and then the pre-stored lubricating oil in the oil can 7 is controlled by the electromagnetic valve 6, enters the hose 8, and then enters the protective shell 2 through the first screw joint 9 and the second screw joint 10, and is sprayed towards the engagement of the two gears in the protective shell 2, and the gears are gradually filled with oil through the rotation of the two gears;

[0040] When the electromagnetic valve 6 of the top plate 5 needs to be disassembled and maintained, the union nut 11 is rotated to be away from the second threaded joint 10, the limiting nut 15 is rotated to be away from the connecting rod 4, the first threaded joint 9 is away from the second threaded joint 10, the top plate 5 is away from the connecting rod 4, the components of the top plate 5 are disassembled and operated, and the first screw cap 13 is screwed on the second threaded joint 10 for sealing after disassembly.

[0041] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0042] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "threading" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited, and those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0043] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A self-lubricating Roots vacuum pump, comprising: Pump body (1); characterized in that a protective shell (2) is fixed at one end of the pump body (1), and an oil injection mechanism is provided on the top of the protective shell (2); The oil filling mechanism includes a base plate (3) and a top plate (5), a solenoid valve (6) fixed to the outer wall of the top plate (5), an oil reservoir (7) connected to the input end of the solenoid valve (6), a hose (8) fixed to the output end of the solenoid valve (6), a first threaded connector (9) connected to one end of the hose (8), and a second threaded connector (10) fixed to the outer wall of the base plate (3). The outer wall of the first threaded connector (9) is threaded with a combined nut (11), and one end of the second threaded connector (10) penetrates the protective shell (2).

2. The self-lubricating Roots vacuum pump according to claim 1, characterized in that: The first threaded connector (9) and the second threaded connector (10) have the same thread direction and can be connected to the joint nut (11) at the same time. The insertion end of the first threaded connector (9) is fixed with a rubber ring (12).

3. The self-lubricating Roots vacuum pump according to claim 1, characterized in that: The second threaded connector (10) has a first screw cap (13) threadedly connected to one end, and the oil can (7) has an opening at the top and a second screw cap (14) threadedly connected to the opening.

4. A self-lubricating Roots vacuum pump according to claim 1, characterized in that: The base plate (3) is set on the top of the protective shell (2) and fixed with bolts. Two meshing gears are provided inside the protective shell (2).

5. A self-lubricating Roots vacuum pump according to claim 4, characterized in that: The second threaded connector (10) passes through one end of the protective shell (2) and faces vertically toward the meshing point of the two gears.

6. A self-lubricating Roots vacuum pump according to claim 1, characterized in that: The bottom plate (3) has two symmetrical connecting rods (4) fixed on its top. The top plate (5) and one end of the connecting rod (4) are connected together. The end of the connecting rod (4) that is connected to the top plate (5) is locked with a limit nut (15).

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