Cam rotor pump with noise reduction structure

Abstract

The invention discloses a cam rotor pump with a noise reduction structure, a pump body shell of the cam rotor pump is provided with a first noise reduction cavity, a front cover and a box body shell of the cam rotor pump are provided with a second noise reduction cavity, and noise reduction materials are stored in the first noise reduction cavity and the second noise reduction cavity; a plurality of sand removing openings are formed outside the first noise reduction cavity and the second noise reduction cavity. The noise reduction material is polypropylene foam and polyurethane foam. By arranging the sound insulation structure, the pump noise can be reduced by 5-7 decibels under the same use pressure, and the field working environment is effectively improved. The material has natural sound absorption performance, heat insulation performance, buffering performance and environmental protection performance, and the fine independent bubble structure in the material effectively reduces the noise of the pump. The noise reduction structure effectively improves the on-site working environment of a user worker, meets the national environmental protection standard requirement, and is the most ideal upgrading product in the cam rotor pump.

Description

Technical Field

[0001] The invention relates to the technical field of cam rotor pumps, and in particular to a cam rotor pump with a double-layer noise reduction structure. Background Art

[0002] The cam rotor pump is mainly composed of a pump body, a casing, a front cover, a rear cover, a driving shaft, a driven shaft, a positioning cover, a bearing gland, and rotors, synchronous gears, bearings, mechanical seals, etc. installed on the driving shaft and the driven shaft respectively.

[0003] However, since the pump is a cam rotor structure, there is pulsation during use, which will cause noise. If the use pressure increases, the pump noise will also increase. However, in recent years, as people's requirements for the comfort of living and working environment have become higher and higher, reducing the noise pollution of the pump has become one of the important indicators for users to evaluate. Summary of the invention

[0004] The object of the present invention is to provide a cam rotor pump with a noise reduction structure to solve the noise reduction problem of the pump.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a cam rotor pump with a noise reduction structure, the pump body shell of the cam rotor pump is provided with a first noise reduction chamber, the front cover and the box shell of the cam rotor pump are provided with a second noise reduction chamber, noise reduction materials are stored in the first noise reduction chamber and the second noise reduction chamber; a plurality of sand removal ports are provided outside the first noise reduction chamber and the second noise reduction chamber.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] By setting up a sound insulation structure, the pump noise can be reduced by 5-7 decibels at the same operating pressure, effectively improving the on-site working environment. This material has natural sound absorption, heat insulation, cushioning and environmental protection properties, and its internal fine independent bubble structure effectively reduces the noise of the pump. The multiple noise reduction structures effectively improve the on-site working environment of the user's workers and meet the national environmental protection standards.

[0008] By setting up a sampling and noise reduction mechanism at the liquid outlet, not only can the cam rotor pump be sampled and tested in a timely manner, but the vibration and noise generated by the valve body can also be eliminated immediately through the damping liquid, further ensuring the comfort of the working environment for construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a cross-sectional view of the cam rotor pump with a noise reduction structure of the present invention.

[0010] Figure 2 It is a left view of the cam rotor pump with a noise reduction structure of the present invention.

[0011] Figure 3 It is a schematic diagram of a cam rotor pump with a noise reduction structure of the present invention.

[0012] Figure 4 For the present invention Figure 3 AA direction cross-sectional view.

[0013] Figure 5 For the present invention Figure 3 BB direction cross-sectional view.

[0014] Figure 6 For the present invention Figure 3 CC direction cross-sectional view.

[0015] Figure 7 This is a schematic diagram of the noise reduction valve mechanism of the present invention.

[0016] Figure 8 This is a detail diagram of point a of the present invention.

[0017] 1. Pump body shell; 2. First noise reduction chamber; 3. Front cover; 4. Box shell; 5. Second noise reduction chamber; 6. Polypropylene foam; 7. Polyurethane foam; 8. Sand removal port; 9. Channel; 10. Plug; 11. Valve body; 12. Sampling cover; 13. Sampling channel; 14. Ball valve; 15. Rotating rod; 16. Inner sleeve; 17. Outer sleeve; 18. Dynamic shear plate; 19. Static shear plate; 20. Sealing ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-6 The present invention provides a technical solution: a cam rotor pump with a noise reduction structure. The cam rotor pump is a prior art, and is composed of a front cover, a pump body, a box body, a rear cover, a driving shaft, a driven shaft, a positioning cover, a bearing gland, and rotors, synchronous gears, bearings, mechanical seals, etc., which are respectively installed on the driving shaft and the driven shaft.

[0020] The pump body shell 1 of the cam rotor pump is provided with a first noise reduction chamber 2, and the front cover 3 and the box shell 4 of the cam rotor pump are provided with a second noise reduction chamber 5. The first noise reduction chamber 2 and the second noise reduction chamber 5 are provided with an outer chamber and an inner chamber. Noise reduction materials are stored in the first noise reduction chamber 2 and the second noise reduction chamber 5. Preferably, the noise reduction materials are polypropylene foam 6 and polyurethane foam 7, which are stored in the outer chamber and the inner chamber, respectively. The first noise reduction chamber 2 and the second noise reduction chamber 5 are provided with a plurality of sand removal ports 8 to facilitate direct filling of the noise reduction materials into the first noise reduction chamber 2 and the second noise reduction chamber 5. The sand removal port 8 is provided with a screw plug 10 to ensure that the noise reduction materials will not overflow after filling.

[0021] The outer chamber and the inner chamber are connected by a channel 9, and the channel 9 is coaxially arranged with the sand removal port 8. In this way, the operator can smoothly inject the noise reduction material into the outer chamber and the inner chamber along the sand removal port 8 and the channel 9.

[0022] The noise reduction chamber is designed to correspond to the shape of the cam rotor pump housing. The first noise reduction chamber 2 is semi-circular. In order to match its own shape, three sand removal ports 8 are provided outside the first noise reduction chamber 2; the second noise reduction chamber 5 is annular, and four sand removal ports 8 are provided outside the second noise reduction chamber 5, which are distributed one each in the upper, lower, left and right directions.

[0023] See also Figure 7-8 In order to ensure that the cam rotor pump maintains a relatively quiet state when outputting liquid, the cam rotor pump also includes a noise reduction valve mechanism. The noise reduction valve mechanism includes a valve body 11 and a rotating rod 15. A flange is installed on the valve body 11 for assembly with the cam rotor pump. A ball valve 14 is arranged in the valve body 11. The ball valve 14 is a structure with two sides through. The valve body 11 can be opened and closed by rotating the ball valve 14, and the ball valve 14 is connected to the rotating rod 15. Since the ball valve 14 is directly impacted by the liquid, the impact force brought by the liquid will directly act on the valve body 11 through the rotating rod 15, thereby generating noise. In order to eliminate this part of the noise, a noise reduction installation mechanism is provided on the side wall of the valve body 11, and the noise reduction installation mechanism cooperates with the rotating rod 15.

[0024] The noise reduction installation mechanism includes an inner sleeve 16 and an outer sleeve 17, the outer sleeve 17 is embedded and installed in the valve body 11, the rotating rod 15 is installed in the inner sleeve 16 through a rotating shaft, a plurality of dynamic shearing pieces 18 are installed on the outer side of the inner sleeve 16, and a plurality of static shearing pieces 19 are installed on the inner side of the inner sleeve 16. The static shearing pieces 19 and the dynamic shearing pieces 18 are arranged at intervals, and the space between the two is filled with damping liquid. Such a design method can increase the filling area of ​​the damping liquid, and achieve a good shock-absorbing and noise-reducing effect through the properties of the damping liquid itself and the buffering effect.

[0025] The valve body 11 is embedded with a sealing ring 20, and the sealing ring 20 cooperates with the inner sleeve 16. Under normal conditions, the sealing ring 20 can directly act on the edge of the inner sleeve 16. In this way, it can be ensured that the damping fluid will not flow out along the gap, and it can also be ensured that the inner sleeve 16 will not move easily during the rotation of the rotating rod 15. When vibration occurs, the inner sleeve 16 will have a slight lateral movement, and the vibration caused by this part of the displacement is buffered by the damping fluid.

[0026] In order to sample and test the output liquid material in the first time, a sampling mechanism is provided in the valve body 11. The sampling mechanism includes a sampling cover 12, which is open at one end and blocked at the other end. The sampling cover 12 is installed in the liquid channel of the valve body 11, and the opening of the sampling cover 12 faces the liquid inlet of the valve body 11. The side wall of the valve body 11 is provided with a sampling channel 13, and the sampling channel 13 is connected to the inner cavity of the sampling cover 12. In this way, the sampled liquid can be output from the valve body 11 in the first time, assisting the operator to judge the specific situation in the cam rotor pump.

[0027] Working principle: When filling the noise reduction material, the remaining sand removal ports 8 need to be blocked and the filling should be carried out layer by layer. When the material in the inner chamber tends to overflow, the filling should be stopped and filled again after it solidifies. After the inner chamber is filled, the outer chamber is filled. After the noise reduction materials in the two chambers are filled, the last sand removal hole 8 is sealed with a wire plug 10.

[0028] When a conventional valve is installed at the output end of the cam rotor pump, the liquid output by the cam rotor pump has a high viscosity, and the impact on the valve will cause vibration and noise. The noise caused by this impact can be effectively eliminated by setting the static shear plate 19 and the dynamic shear plate 18, and the combination of the damping liquid. And through the cooperation of the sampling mechanism, it is convenient to sample the output liquid in time, so as to assist the operator to judge the actual situation of the liquid in the cam rotor pump.

[0029] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cam rotor pump with a noise reduction structure, characterized in that: The pump body shell (1) of the cam rotor pump is provided with a first noise reduction chamber (2), and the front cover (3) and the box shell (4) of the cam rotor pump are provided with a second noise reduction chamber (5), and noise reduction materials are stored in both the first noise reduction chamber (2) and the second noise reduction chamber (5); A plurality of sand removal ports (8) are provided outside the first noise reduction chamber (2) and the second noise reduction chamber (5).

2. The cam rotor pump with a noise reduction structure according to claim 1, characterized in that: The noise reduction material is polypropylene foam (6) and polyurethane foam (7).

3. The cam rotor pump with a noise reduction structure according to claim 2, characterized in that: The first noise reduction chamber (2) and the second noise reduction chamber (5) are both provided with an outer chamber and an inner chamber, and the outer chamber and the inner chamber are connected by a channel (9); The polypropylene foam (6) and the polyurethane foam (7) are respectively placed in the outer cavity and the inner cavity.

4. The cam rotor pump with a noise reduction structure according to claim 1, characterized in that: The first noise reduction chamber (2) is semi-annular, and three sand removal ports (8) are provided outside the first noise reduction chamber (2).

5. The cam rotor pump with a noise reduction structure according to claim 1, characterized in that: The second noise reduction chamber (5) is annular, and four sand removal ports (8) are provided outside the second noise reduction chamber (5).

6. The cam rotor pump with a noise reduction structure according to claim 1, characterized in that: A thread plug (10) is provided in the sand removal port (8).

7. The cam rotor pump with a noise reduction structure according to claim 3, characterized in that: The channel (9) is coaxially arranged with the sand removal port (8).

8. The cam rotor pump with a noise reduction structure according to claim 1, characterized in that: The invention also comprises a noise reduction valve mechanism, the noise reduction valve mechanism comprising a valve body (11) and a rotating rod (15), a ball valve (14) is arranged in the valve body (11), and the ball valve (14) is connected to the rotating rod (15), a noise reduction installation mechanism is arranged on the side wall of the valve body (11), and the noise reduction installation mechanism cooperates with the rotating rod (15); a sampling mechanism is arranged in the valve body (11).

9. The cam rotor pump with a noise reduction structure according to claim 8, characterized in that: The noise reduction installation mechanism comprises an inner sleeve (16) and an outer sleeve (17), the outer sleeve (17) is embedded and installed in the valve body (11), the rotating rod (15) is installed on the inner sleeve (16) through a rotating shaft, a plurality of dynamic shearing pieces (18) are installed on the outer side of the inner sleeve (16), a plurality of static shearing pieces (19) are installed on the inner side of the inner sleeve (16), and damping fluid is filled between the static shearing pieces (19) and the dynamic shearing pieces (18); A sealing ring (20) is embedded and installed in the valve body (11), and the sealing ring (20) cooperates with the inner sleeve (16).

10. The cam rotor pump with a noise reduction structure according to claim 8, characterized in that: The sampling mechanism comprises a sampling cover (12), the sampling cover (12) being installed in the liquid channel of the valve body (11), and the opening of the sampling cover (12) is facing the liquid inlet of the valve body (11), and the side wall of the valve body (11) is provided with a sampling channel (13), and the sampling channel (13) is connected to the inner cavity of the sampling cover (12).

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